diff options
author | Christoph Hellwig <hch@lst.de> | 2021-12-15 09:45:08 +0100 |
---|---|---|
committer | Dan Williams <dan.j.williams@intel.com> | 2021-12-18 17:04:53 +0100 |
commit | 7ac5360cd4d02cc7e0eaf10867f599e041822f12 (patch) | |
tree | 995133c39f548b5ce8f01cc3a72f15d85838a630 /fs/dax.c | |
parent | dax: remove the DAXDEV_F_SYNC flag (diff) | |
download | linux-7ac5360cd4d02cc7e0eaf10867f599e041822f12.tar.xz linux-7ac5360cd4d02cc7e0eaf10867f599e041822f12.zip |
dax: remove the copy_from_iter and copy_to_iter methods
These methods indirect the actual DAX read/write path. In the end pmem
uses magic flush and mc safe variants and fuse and dcssblk use plain ones
while device mapper picks redirects to the underlying device.
Add set_dax_nocache() and set_dax_nomc() APIs to control which copy
routines are used to remove indirect call from the read/write fast path
as well as a lot of boilerplate code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com> [virtiofs]
Link: https://lore.kernel.org/r/20211215084508.435401-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/dax.c')
-rw-r--r-- | fs/dax.c | 5 |
1 files changed, 0 insertions, 5 deletions
@@ -1260,11 +1260,6 @@ static loff_t dax_iomap_iter(const struct iomap_iter *iomi, if (map_len > end - pos) map_len = end - pos; - /* - * The userspace address for the memory copy has already been - * validated via access_ok() in either vfs_read() or - * vfs_write(), depending on which operation we are doing. - */ if (iov_iter_rw(iter) == WRITE) xfer = dax_copy_from_iter(dax_dev, pgoff, kaddr, map_len, iter); |